{"note":"bim_versions 導入後の保存のみ記録 (それ以前は bim_canonical 上書きで履歴なし)","ok":true,"slug":"u-house-pp0rgjgo","versions":[{"created_at":"2026-08-03T19:13:40Z","element_count":146,"note":"言葉から生成: L字 / 狭小の町家・吹抜・坪庭 / 東西吹抜 / 南面坪庭 / 東西中庭 / 高気密高断熱 / 強風対策","saved_by":"mcp:create","sha256":"","version":1}]}